please bear with me this is my first time posting to this or any other site 2 things first my oil alarm goes off when i open it up over about 4200 rpm about 3/4 of full throttle otherwise it runs great i have opened up the oil tank to check the filter i didn't see any obvious clogs i dont know if there are any other filters such as inline also after a days outing i have oil leaking down the side of the motor on the mid section below the power head looks as though it could be comeing from the back side of the motor possible head gasket?i don't know much about outboard motors. the motor is an evenrude VRO 90 horse model#e90tlcdc serial#j1122137 thanks for any help or advice. 1 more thing i do alot of trolling at idle speed is this bad for the motor? possible cause of oil leak?